Quick Answer:

A sensible greenhouse gardening plan involves growing only what you love, measuring and planning seed orders carefully, using the greenhouse for propagation and early starts, managing heat for both cool and warm crops, and scattering quick-growing plants to maximize space and productivity year-round.

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Greenhouse Growing is Planning for the Future

I am eating a lot of Kale and Bok Choi from my cool Greenhouse Garden right now.  The winter-sown spinach is suddenly starting to explode as the days get longer too. There are still a few beets and carrots in the greenhouse and the season of overlapping crops is about to begin.  This is a normal life with a greenhouse growing.

Quick Answer:

Start tomato seeds in mid to late March with bottom heat, provide strong light and nutrients early, and move them into your greenhouse once temperatures consistently stay above 10°C (50°F); maintain airflow and prune lower leaves as fruit sets to optimize harvest into fall.

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So Many Tomatoes, So Little Space

Greenhouse tomato growers are rightfully confused when they see so many kinds of greenhouse tomatoes for sale. Karen Olivier, an independent tomato breeder from the Secret Seed Cartel, estimates there are 20,000 kinds of tomatoes listed right now and she is adding to that number by breeding new tomatoes every year.

 

Quick Answer:

What Are the Best Tips for Soil Amendments & Nutrients in a Greenhouse Garden?
Optimizing greenhouse soil requires building “super soil” by blending quality soil-less mix with compost, biochar, and worm castings, plus adding essential nutrients like nitrogen, phosphorus, potassium, calcium, and micronutrients through amendments such as seed meals, lime, kelp, and gypsum. Recognizing nutrient deficiency signs—like purple leaves from low phosphorus or brown spots from potassium shortage—helps timely fertilization and soil management, ensuring healthy plant growth and improved crop flavor. Regular soil amendment and fertilization tailored to plant needs foster vibrant, productive greenhouse gardens year-round.

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Importance of Soil Amendments & Nutrients in Greenhouse Gardening

A few years back my greenhouse tomato leaves were purple, yellow and spotted. Not all at once, but over time and on different leaves. It was the second year I was growing in my greenhouse and the commercial potting soil I bought was low on phosphorus, nitrogen and potassium. The leaves on the plants were telling me what was going on. And it didn’t look good.

Quick Answer:

What are the tips for ordering seeds and supplies for hobby greenhouse growing? To succeed in hobby greenhouse gardening, it’s crucial to read seed catalog fine print carefully—choosing parthenocarpic varieties for cucumbers and zucchinis that don’t require pollination, selecting heat-tolerant and slow-bolting plant varieties, and using foliar fertilizers for cold soils. Understanding pollination needs, temperature tolerance, and plant growth habits ensures better yields and healthier crops year-round. Starting seeds indoors, like onions in January, and adapting to your greenhouse environment helps optimize growth and harvest success.

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Before You Order Seeds for Your Hobby Greenhouse, Read the Fine Print

 

When I started growing in my Greenhouse Garden a few of my favourite plants stopped working for me. That's what I learned to read the catalog fine print and adapt my shopping for a better hobby greenhouse growing. 

Quick Answer:

How Can Warming Soil Help You Rush the Growing Season and Speed Up Crop Growth? Warming soil with electric heating cables prevents freezing, creates a heat reservoir that radiates warmth to plants, and accelerates seed germination and crop growth, enabling gardeners to start hardy and heat-loving crops earlier in the season for faster, more productive harvests.

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Is patience a virtue?

Some gardeners wait for the sun to gently warm the soil before they start their garden. Others are impatient.

Quick Answer:

What Are the Secrets to Testing Old Seeds and Growing Golden Sesame Seeds?
To test if old seeds are viable, place ten seeds on a moist paper towel in a ziplock bag and check for sprouting within a few days—this simple germination test helps gardeners save money and plan better. Golden sesame thrives in heat and drought, making it an ideal crop to start in a greenhouse and transplant outdoors for a high-yield harvest. Open-pollinated sesame allows for seed saving, extending your harvests year after year while maximizing greenhouse potential in any season.

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A new crop, discovered in a seed catalogue last year, piqued my growing interest. I grow lots of vegetables but growing Sesame seeds didn’t occur to me until I saw them listed. I'm excited to try something new I ordered it right away.

 

Quick Answer:

How Do I Grow Arugula in My Greenhouse From Seed to Salad?
Arugula is an easy, hardy winter green that thrives in cool greenhouse conditions, reseeds itself naturally, and requires minimal pest control with simple mesh covers in spring. Growing your own arugula lets you enjoy fresh, flavorful leaves and edible flowers all winter long, perfect for salads or toppings. Understanding its growth cycle helps you maximize harvests and incorporate this nutritious green into your seasonal meals confidently.

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My go-to recipe

My potluck arugula salad is sprinkled with jewel-toned tropical pomegranate seeds. My neighbour Barbara is excited and quickly tells me how much she loves the bitter taste of arugula. So I tell her I grow arugula as a winter crop and now she is all ears.

What is the Best Soil for Greenhouse Growing?

Quick Answer:

What is the best soil for greenhouse gardening? The ideal soil for greenhouse growing balances drainage, nutrient retention, and microbial activity—making custom blends like loam, triple mix, or super soil more effective than natural or bagged top soils. Should you use bagged soil or soil-less mixes in a greenhouse? While convenient, most bagged top soils and soil-less mixes lack essential nutrients and structure for long-term crops, so combining them with compost or organic amendments is key. How can you create high-performance soil for greenhouse plants? Blending your own triple mix (one-third soil, compost, and peat) or upgrading to a nutrient-rich super soil with worm castings, biochar, and trace minerals provides a strong foundation for healthier plants, richer flavors, and vibrant blooms.

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If you are new to gardening and think growing is just a matter of adding water, you're in for a surprise. With terms like super soil, triple mix, natural soil, and even soil with no soil—it's no wonder new gardeners feel overwhelemed. So how do you choose the right soil for strong, healthy growth? And how do you get the most flavorful food and the brightest blooms?

Quick Answer:

To keep your plants safe in winter, use your greenhouse as a controlled environment by insulating with materials like bubble wrap, using energy-efficient methods such as partitioned zones or under-bench heating, and bringing more delicate plants indoors. Cold-hardy crops can thrive with minimal heating, and creative techniques like milk jug gardening or covered trays can extend your growing season. Personalize your setup to balance energy use, plant needs, and available space, turning setbacks—like a fallen Christmas cactus—into opportunities for propagation and resilience

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Saturday Morning Startle

It’s 7 AM and I’m having coffee in my cozy rocking chair waiting for the sun to come up so I can walk the dogs.

Quick Answer:

To grow healthy plants in greenhouse pots, select the right pot size and material—using breathable options like terra cotta or fabric pots for moisture-sensitive plants—choose nutrient-rich soil suited to your crop, and refresh or repot plants seasonally to prevent root crowding and nutrient depletion, ensuring optimal growth and flexibility.

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How do you grow?

Essentially there are two ways to grow in soil in your greenhouse. You can grow in pots or you can grow in planting beds. We look now at growing in posts, and we will consider the positives and negatives growing directly in the ground.